(function(Proton, undefined) {
    function Gravity(g, life, easing) {
        Gravity._super_.call(this, 0, -g, 0, life, easing);
        this.name = "Gravity";
    }

    Proton.Util.inherits(Gravity, Proton.Force);

    Gravity.prototype.reset = function(g, life, easing) {
        Gravity._super_.prototype.reset.call(this, 0, -g, 0, life, easing);
    }

    Proton.Gravity = Gravity;
    Proton.G = Gravity;
})(Proton);
